UPDATE: RESTORING JACK’S LAKE SPRING 2011
BROWN SIGNS STATE PARKS BILL
Read article HERE
MORE STUDIES REQUIRED: RED LEGGED FROGS
Federal and state guidelines require us to survey for the presence of RED LEGGED FROGS, an
endangered species, and also require us to conduct a complete Biological Assessment. These
two surveys are costly and time consuming. Presently the ALLIANCE is funding the RED
LEGGED FROG survey, see the photos in the Gallery and on our facebook page!
Read the report from the first daytime survey HERE
SEVERE EROSION continues…COMMUNITY SUPPORT grows…
Many local organizations sent letters of support to JLLA, making a case for remediation of the
severe erosion and silt load created by the inadequate and broken outlet system at the base of the dam. JLLA is in the process of petitioning the SF Bay Joint Venture for adoption of the project.
Sonoma Birding, Sonoma Land Trust, Sonoma Mountain Preservation, Sonoma Ecology Center
and Assemblyman Jared Huffman all voiced strong concern and support for the correction of the
outflow at the lake.
CORE SAMPLES of DAM reveal type of concrete and filler used to construct the dam and
indicate remortaring will strengthen the dam. This report was required by DPR and funded by
donations to JLLA.
See photos of the core sampling in the Gallery and on our facebook page!
Read the report from the core sampling HERE (PDF)
UPDATE: RESTORING JACK’S LAKE as of JULY 2010
The total estimated cost of the Lake Project is $1.3 million. We have raised more than $175,000, and will need additional help from private donors, businesses, and community foundations!
Summer 2010: Steps in Progress
- Formal consultation with Native American Tribal groups
- Test Archeology sites and complete excavation report to complete Federal Permits
- Develop project scope for engineering repair
- Develop dredging and construction contracts and timeline for 2011
The Alliance’s Accomplishments
- Raised awareness of the lake’s historic value
- Funded initial surveys, engineering of drain outflow and dredging, and permitting fees
- Completed nearly 70% of State and Federal CEQA natural resource permit
Project Overview
The dredging plan, the drain outlet design, and are nearing completion in filing the necessary permits with various agencies. You may have seen the recent press detailing the new three-stage approach,
1. Drain the lake, remove failing mortar, re-mortar and re-cap the dam.
2. Contour the lakebed to increase the depth and correct the banks. This will control the water temperature and reduce incursion of non-native plants. The intention is to return the lake to nearly five acres in size.
3. Restore the footpath, restore the eroded gullies and re-vegetate the land uphill in order to reduce erosion. Interpretive signage will also be designed and installed.
This new approach is a great way to break the task into three manageable sections, with the added advantage of strengthening the dam prior to reshaping the lakebed.